HONOLULU " Coworkers on Tripler Army Medical Center's General Surgery Ward, 1st Lt. Rachel Hanlon (left), registered nurse, and Capt. Tanekkia Taylor-Clark, clinical nurse officer in charge, practice donning their protective masks, a warrior task that must be completed in under nine seconds in the Expert Field Medical Badge course, scheduled to begin Oct. 29 at Schofield Barracks. More than 20 Soldiers interested in earning the right to wear the EFMB joined volunteer instructors and EFMB holders throughout August, September and October to train for the upcoming course.